A novel pollution index to assess the metal bioavailability and ecological risks in sediments.
Mar Pollut Bull
; 191: 114926, 2023 Jun.
Article
in En
| MEDLINE
| ID: mdl-37075561
ABSTRACT
The chemical forms of metals in sediments of ports around Taiwan were investigated using sequential extraction. Based on the availability of different chemical forms, novel indices such as bioavailability, mobility, availability, and availability risk of metals in sediments were developed. The results showed that Co, Zn, Pb, Mn, and Cu were mainly present in available forms (49-84 %), and the proportion of oxidative or reductive fractionation was the highest. This suggests that the redox potential is a major factor for metal mobility in the sediments. The results from the proposed indexes showed that metals in sediments have low bioavailability but high to very high mobility and availability. Primarily, the proposed index is more appropriate, as the current index for assessing total metal content may overestimate the level of risk. The indexes established can comprehensively evaluate the bioavailability, mobility, availability, and ecological risk of metals in sediments.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Water Pollutants, Chemical
/
Metals, Heavy
Type of study:
Etiology_studies
/
Risk_factors_studies
Language:
En
Journal:
Mar Pollut Bull
Year:
2023
Document type:
Article
Affiliation country: